Power-transmitting device.



um man.)

- Patented Aug. 20,190L F. GRANT.

POWER TRANSMITTI'NG DEVICE.

[Application led Oct. 25, 1900.)

wwf/74% W In the drawings forming a portion of this specification, andin which like numerals of UNITED STATES PATENT UEETCE.

FREEMAN GRANT, OF STONINGTON, MAINE.

POWER-TRANSMITTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 681,116, dated August20, 1901.

Application filed October 25, 1900. Serial No. 34,349. (No model.)

To @ZZ whom, it' may concorre:

4Be it known that I, FEEEMAGRANT, a citizen of the United States,residing at Stoning- Y tinfrdevicesin reneral and more articular] to adevice for converting reciprocatory motion into rotary motion, and theprinciples involved may be employed in connection with any style ofreciprocatory fluid-pressure engine, the object of the invention beingto provide asimple and efficient construction wherein it will beimpossible for the engine to get ou a`dead-center and wherein theleverage will be approximately constant.

Further objects and advantages of the invention will be apparent fromthe following description.

reference indicate similar parts in the several views, Figure l is aside elevation showing the pawl-carrying frame, with the plates removedat one side to show the positions of the pawls with respect to theratchet. Fig. 2

is a longitudinal section of the head of the piston-rod, taken in aplane above the rod andthe engine-shaft and showing thedisposition ofthe driving-ratchet with respect to the engaging-pawl frame.

` Referring nowtothedrawings, 5 represents' the cylinder of areciprocatory steam-engine, inwhiclris a piston Ahaving a projecting rod6, which is adapted for reciprocation under the influence of steamadmitted alternately to the ends of the cylinder in the usual andWell-known manner, the cut-o mechanism, of usual construction, beingoperated by engagement of fingers 7 and Supon the pistonrod, with astop9 upon the valve-rod 10. The outer end of the piston-rod instead ofhaving the usual cross-head attached thereto and operating in guides hasattached to its outer end a frame. This frame comprises"` end plates 11and 12, at the ends of which project flanges 13, laterally in pairs, andconnecting the corresponding flanges of the end plates are side plates14, which are oppositely disposed in pairs, each pair of side plates"forming a guideway, so that two guideways are formed, one at each sideof the frame.

Upon the inner face of each plate 14L are formed diagonal flanges orribs 15, the flanges of each pair of plates lying parallel, and at the outer end of each of these anges is formed a shoulder 16, having acurvilinear recess in its face in which is seated the curvilinear end ofa pawl 17, which is held pivotally i'n place. These 'pawls 17 are heldnorinallyito lie flat against the flanges l5 by means of coilsprings, asshown, the extremities of the pawls being thus held normally engagedwith the teeth of a ratchet-wheel 18, which is fixed upon theengine-shaft 19. The pawls being disposed in oppositev directions at thetwo sides of the frame, it naturally follows that when the frame ismoved in one direction one set of pawls successively engage theratchetwheel operatively and rotate it,while the other series of pawlssnap idly over the ratchetteeth, the former idle teeth being operativeand the former active teeth being inoperative when the direction ofmovement of the frame is reversed. By the formation and arrange ment ofthe flanges and the shoulders at the bases thereof the strain is takenfrom the pivots of the pawls, so that a structure of great strength isobtained.

As shown in the drawings, the side plates may be adjustably connectedwith the end plates of the frame, so that the two series of pawls may bemoved toward and away from each other,and thus when itis desired torotate the engine-shaft at a greater or lesser speed, with a constantspeed of reciprocation of the pistou-rod, a smaller or largerratchet-wheel may be secured upon the engine-shaft, and the side platesof the frame may be adjusted to properly engage the pawls with thesubstituted ratchet-Wheel.

It will of course be understood that in practice various modificationsof the construction shown may be made and that` any suitable materialsand proportions may be used for the various parts thereof withoutdeparting from the spirit of the invention.

What is claimed is- IOO l. Inadevice of the class described, v`thecombination with the reciprocating frod and shaft, of a frame comprisingside portions having gnideways, pawls pivotally mounted in' theguideways, the pawls at opposite sides of the frame being disposedoppositely,-anda ratchet-Wheel xed upon the shaft and lying with itsperiphery in operative relation to the pawls.

2. In a device of the class described, the combination with thereciprocating rod and shaft, of a frame comprising side portion-s adjnstahle Vtoward and away from each other, pawls pivoted upon the sideplates and ad` linstable therewith, and a ratchet removably disposedupon the shaft in operative'relation to the pawls, said shaft`beingadapted toreceive -ratche'ts of different diametersinterchangeably.

3. Ina device of the class described, the combination with thereciprocating rod and shaft, a ratchet removably engaged with the shaftto permit of substitution of a ratchet of different diameter, and aframe fixed to the rod, said frame comprising side plates disposed inpairs, and pawls pivoted between the pairs of plates in operativerelation to the ratchets'opposite1y, said pairs of side plates

